$ git clone -n https://src.fedoraproject.org/rpms/maxima.git /var/lib/mock/f40-build-2405861-60558/root/chroot_tmpdir/scmroot/maxima
Cloning into '/var/lib/mock/f40-build-2405861-60558/root/chroot_tmpdir/scmroot/maxima'...
$ git fetch origin 271a34eac894df6d9a3e48c3ac1990992b62e0df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maxima
 * [new ref]         271a34eac894df6d9a3e48c3ac1990992b62e0df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 271a34e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild